Drop error details index gh#2776

[harminius]

Fixes: #2776

On production we'll use the following:
DROP INDEX CONCURRENTLY IF EXISTS ix_sync_failures_history_error_details;
to avoid downtime, instead.

[coveralls]

Pull Request Test Coverage Report for Build 13431892706

Details

• 1 of 1 (100.0%) changed or added relevant line in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 92.411%

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Totals
Change from base Build 13409423805:	0.0%
Covered Lines:	6770
Relevant Lines:	7326

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💛 - Coveralls